<template>
    <div>
        <!--面包屑导航区-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
        <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
            <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import echarts from 'echarts'
export default {
    data() {
        return {
            // 需要合并的数据
            options: {
            title: {
                text: '用户来源'
            },
            tooltip: {
                trigger: 'axis',
                axisPointer: {
                type: 'cross',
                label: {
                    backgroundColor: '#E9EEF3'
                }
                }
            },
            grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
            },
            xAxis: [
                {
                boundaryGap: false
                }
            ],
            yAxis: [
                {
                type: 'value'
                }
            ]
            }
        }
    },
    created() {

    },
    // 此时 页面上的元素，已经被渲染完毕了
    async mounted() {
        // 3. 基于准备好的dom,初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const { data:res } = await this.$axios.get(`reports/type/1`)
        if (res.meta.status !== 200) {
            return this.$message.error('获取折线图数据失败')
        }

        // 4.准备数据和配置项
        const result = _.merge(res.data, this.options)

        // 5. 展示数据
        myChart.setOption(result)
    },
    methods: {

    }
}
</script>

<style lang="less" scoped>

</style>